CodeGenInstruction.h revision cdd66b524f62ef6acd6bfa4e586edf8a406c4928 
1//===- CodeGenInstruction.h - Instruction Class Wrapper ---------*- C++ -*-===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file was developed by the LLVM research group and is distributed under
6// the University of Illinois Open Source License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10// This file defines a wrapper class for the 'Instruction' TableGen class.
11//
12//===----------------------------------------------------------------------===//
13
14#ifndef CODEGEN_INSTRUCTION_H
15#define CODEGEN_INSTRUCTION_H
16
17#include "llvm/CodeGen/ValueTypes.h"
18#include <string>
19#include <vector>
20#include <utility>
21
22namespace llvm {
23  class Record;
24
25  struct CodeGenInstruction {
26    Record *TheDef;            // The actual record defining this instruction.
27    std::string Name;          // Contents of the 'Name' field.
28    std::string Namespace;     // The namespace the instruction is in.
29
30    /// AsmString - The format string used to emit a .s file for the
31    /// instruction.
32    std::string AsmString;
33
34    /// OperandInfo - The information we keep track of for each operand in the
35    /// operand list for a tablegen instruction.
36    struct OperandInfo {
37      /// Rec - The definition this operand is declared as.
38      Record *Rec;
39
40      /// Ty - The MachineValueType of the operand.
41      ///
42      MVT::ValueType Ty;
43
44      /// Name - If this operand was assigned a symbolic name, this is it,
45      /// otherwise, it's empty.
46      std::string Name;
47
48      /// PrinterMethodName - The method used to print operands of this type in
49      /// the asmprinter.
50      std::string PrinterMethodName;
51
52      /// MIOperandNo - Currently (this is meant to be phased out), some logical
53      /// operands correspond to multiple MachineInstr operands.  In the X86
54      /// target for example, one address operand is represented as 4
55      /// MachineOperands.  Because of this, the operand number in the
56      /// OperandList may not match the MachineInstr operand num.  Until it
57      /// does, this contains the MI operand index of this operand.
58      unsigned MIOperandNo;
59
60      OperandInfo(Record *R, MVT::ValueType T, const std::string &N,
61                  const std::string &PMN, unsigned MION)
62        : Rec(R), Ty(T), Name(N), PrinterMethodName(PMN), MIOperandNo(MION) {}
63    };
64
65    /// OperandList - The list of declared operands, along with their declared
66    /// type (which is a record).
67    std::vector<OperandInfo> OperandList;
68
69    // Various boolean values we track for the instruction.
70    bool isReturn;
71    bool isBranch;
72    bool isBarrier;
73    bool isCall;
74    bool isLoad;
75    bool isStore;
76    bool isTwoAddress;
77    bool isTerminator;
78    bool hasDelaySlot;
79
80    CodeGenInstruction(Record *R, const std::string &AsmStr);
81
82    /// getOperandNamed - Return the index of the operand with the specified
83    /// non-empty name.  If the instruction does not have an operand with the
84    /// specified name, throw an exception.
85    unsigned getOperandNamed(const std::string &Name) const;
86  };
87}
88
89#endif
90